Propargyl-PEG3-NHS ester

CAS NO.：1428629-71-3
Empirical Formula: C14H19NO7
Molecular Weight: 313.3
MDL number: MFCD23726610
Update Date: 2026-02-03 20:41:04

What is Propargyl-PEG3-NHS ester?

Description

Propargyl-PEG3-NHS ester is a Click Chemistry reagent with a propargyl group and an NHS ester group. The propargyl group can react with biomolecules containing azide group via copper catalyzed Click Chemistry reaction. The NHS ester is an amine reactive group which can be used for derivatizing peptides, antibodies, amine coated surfaces etc.

Biological Activity

Propargyl-PEG3-NHS ester is a PROTAC bridge, belonging to the PEG class and the Alkyl/ether class. It can be used to synthesize a range of PROTAC molecules. It is a cleavable ADC linker for the synthesis of antibody drug conjugates (ADCs).

in vitro

PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins.
ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.

Properties of Propargyl-PEG3-NHS ester

Boiling point:	427.2±55.0 °C(Predicted)
Density	1.26±0.1 g/cm3(Predicted)
solubility	Soluble in DMSO, DCM, DMF
color	Colorless to light yellow
InChI	InChI=1S/C14H19NO7/c1-2-6-19-8-10-21-11-9-20-7-5-14(18)22-15-12(16)3-4-13(15)17/h1H,3-11H2

Safety information for Propargyl-PEG3-NHS ester

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.